Comment 0 for bug 1417209

The touchpad in this machine needs module options proto=imps.

As a workaround we can put this in /etc/modprobe.d/psmouse.conf:
options psmouse proto=imps

We should add this to the kerenl quirks table.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.18.0-11-generic 3.18.0-11.12
ProcVersionSignature: Ubuntu 3.18.0-11.12-generic 3.18.3
Uname: Linux 3.18.0-11-generic x86_64
ApportVersion: 2.15.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: rharding 4834 F.... pulseaudio
 /dev/snd/controlC0: rharding 4834 F.... pulseaudio
Date: Mon Feb 2 13:11:56 2015
HibernationDevice: RESUME=UUID=4c36f201-eb71-46f1-b328-da101c2d5e42
InstallationDate: Installed on 2015-01-28 (5 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: LENOVO 20BSCTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.18.0-11-generic.efi.signed root=UUID=2615e3f9-3c2d-4724-a6a3-30f51119c067 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.18.0-11-generic N/A
 linux-backports-modules-3.18.0-11-generic N/A
 linux-firmware 1.141
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-01-29 (4 days ago)
dmi.bios.date: 10/27/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: N14ET24W (1.02 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BSCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN14ET24W(1.02):bd10/27/2014:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20BSCTO1WW
dmi.product.version: ThinkPad X1 Carbon 3rd
dmi.sys.vendor: LENOVO